Malicious PDF — malware analysis report

Static analysis result for SHA-256 f922703ccea61bb8…

MALICIOUS

PDF

16.4 KB Created: 2019-05-07 04:32:28 +01:00 Authoring application: mPDF 5.7
MD5: bc926bd2c4af439ec470771c83d8cfd7 SHA-1: 6bd8521aa054ecfffd5ea162c2f363288dd9e6c6 SHA-256: f922703ccea61bb8f5b20834f9022075c720766aaf027d8c21e238fb84b6e3d7
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. These URLs point to external PDF documents, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this file as malicious. While no scripts were extracted, the sheer volume of links and the ML classification indicate a malicious intent, likely to drive traffic or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://muicuiu.dumb1.com/4a01a05a09a01a08/Since-We-Fell-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/1a07a09a02a09a03/Live-by-Night-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/2a02a05a02a08a03/Shutter-Island-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/4a08a04/World-Gone-By-Coughlin-3-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/2a00a06a01a00a05/Moonlight-Mile-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a01a03/Interview-with-Dennis-Lehane-by-Andrew-Gulli.pdf
    • http://muicuiu.dumb1.com/2a01a08a02a00a04/A-Drink-Before-the-War-Kenzie-amp-Gennaro-1-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/6a05a02a01a08/Darkness-Take-My-Hand-Kenzie-amp-Gennaro-2-by-Dennis-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a04a06/Novels-by-Dennis-Lehane-Shutter-Island-a-Drink-Before-the-War-the-Given-Day-Prayers-for-Rain-Sacred-by-Books-LLC.pdf
    • http://muicuiu.dumb1.com/1a00a07a09a05a03a04/Sanguine-Abgrund-by-Max-Lupin.pdf
    • http://muicuiu.dumb1.com/1a00a07a09a04a04a06/-ber-dem-Abgrund-by-Dani-Pettrey.pdf
    • http://muicuiu.dumb1.com/1a00a05a02a07a03a08/Abgrund-Nightmares-and-Dreamscapes-by-Stephen-King.pdf
    • http://muicuiu.dumb1.com/1a00a07a09a05a08a08/Der-Nachtelf---Himmel-und-Abgrund-by-Markus-Tillmanns.pdf
    • http://muicuiu.dumb1.com/1a01a04a00a02a06a05/Das-Euro-Desaster-Wie-deutsche-Wirtschaftspolitik-die-Eurozone-in-den-Abgrund-treibt-by-Heiner-Flassbeck.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a01a08/What-Goes-Around-Comes-Around-Brian-McNulty-2-by-Con-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a05a08a09/Sequences-and-Pathogens-by-Dorothy-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a04a04/The-Quest-of-Three-Abbots-by-Brendan-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a05a07/The-Northwest-Passage-The-Seafarers-20-by-Brendan-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a01a04/Early-Celtic-Christianity-by-Brendan-Lehane.pdf
    • http://muicuiu.dumb1.com/8a02a08a04a05a05/Wild-Ireland-A-Traveller-s-Guide-by-Brendan-Lehane.pdf

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